85417-80-7Relevant academic research and scientific papers
Diverse C-P Cross-Couplings of Arylsulfonium Salts with Diarylphosphines via Selective C-S Bond Cleavage
Ye, Yun,Zhu, Jie,Huang, Yinhua
supporting information, p. 2386 - 2391 (2021/04/05)
Diverse C-P cross-couplings of arylthianthrenium salts with diarylphosphines producing various triarylphosphines via highly selective C-S bond cleavage are reported. In the absence of catalyst, the reaction of arylthianthrenium salts with diarylphosphines undergoes phosphinative ring opening exclusively via the cleavage of an endocyclic C-S bond of a thianthrene skeleton. The use of a palladacycle catalyst under otherwise the same conditions enables the phosphination via the cleavage of an exocyclic C-S bond with significantly higher speed.
Titanium dioxide nanoparticles functionalized with Pd and W complexes of a catecholphosphane ligand
Lucas, Nigel T.,Hook, James M.,McDonagh, Andrew M.,Colbran, Stephen B.
, p. 496 - 503 (2007/10/03)
Palladium and tungsten complexes containing the bifunctional ligand 4-diphenylphosphanylcatechol (L1) have been synthesized. The catecholate functionality strongly binds to titanium dioxide nanoparticles, effectively anchoring the complexes to
Rational design and assembly of M2M′3L6 supramolecular clusters with C3h symmetry by exploiting incommensurate symmetry numbers
Sun,Johnson,Caulder,Raymond,Wong
, p. 2752 - 2763 (2007/10/03)
A rational approach to heterometallic cluster formation is described that uses incommensurate symmetry requirements at two different metals to control the stoichiometry of the assembly. Critical to this strategy is the proper design and synthesis of hybrid ligands with coordination sites selective toward each metal. The phosphino-catechol ligand 4-(diphenylphosphino)benzene-1,2-diol (H2L) possesses both hard catecholate and soft phosphine donor sites and serves such a role, using soft (C2-symmetric) and hard (C3-symmetric) metal centers. The ML3 catecholate complexes (M = FeIII, GaIII, TiIV, SnIV) have been prepared and characterized as C3-symmetry precursors for the stepwise assembly (aufbau) of heterometallic clusters. While the single-crystal X-ray structure of the Cs2 [TiL3] salt shows a C1 mer-configuration in the solid-state, room-temperature solution NMR data of this and related complexes are consistent with either exclusive formation of the C3-fac-isomer with all PPh2 donor sites syn to each other or facile fac/mer isomerization. Coordination of these [ML3]2- (M = TiIV, SnIV) metallaligands via their soft P donor sites to C2-symmetric PdBr2 units gives exclusively pentametallic [M2Pd3Br6L6]4- (M = Ti, Sn) clusters. These clusters have been fully characterized by spectral and X-ray structural data as C3h mesocates with Cs+ or protonated 1,4-diazabicyclo-[2.2.2]octane (DABCO·H+) cations incorporated into deep molecular clefts. Exclusive formation of this type of supramolecular species is sensitive to the nature of the counterions. Alkali cations such as K+, Rb+, and Cs+ give high-yield formation of the respective clusters while NEt3H+ and NMe4+ yield none of the desired products. Extension of the aufbau assembly to produce related [M2Pd3Cl6L6]4-, [M2Pd3I6L6]4-, and [M2Cr3(CO)12L6]4- (M = Ti, Sn) clusters has also been realized. In addition to this aufbau approach, self-assembly of several of these [M2Pd3Br6L6]4- clusters from all eleven components (two MIV, three PdBr2, six H2L) was also accomplished under appropriate reaction conditions.
Axially Dissymmetric Diphosphines in the Biphenyl Series: Synthesis of (6,6'-Dimethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) ('MeO-BIPHEP') and Analogues via an ortho-Lithiation/Iodination Ullmann-Reaction Approach
Schmid, Rudolf,Foricher, Joseph,Cereghetti, Marco,Schoenholzer, Peter
, p. 370 - 389 (2007/10/02)
The new axially dissymmetric diphosphines (R)- and (S)-(6,6'-dimethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) ((R)- and (S)-5a; 'MeO-BIPHEP') and the analogues (R)- and (S)-5b and 5c have been synthesized in enantiomerically pure form.These lignands hav
PHOSPHORORGANISCHE VERBINDUNGEN 101. TERTIAERE PHOSPHINE MIT ORTHOALKOXYPHENYL-GRUPPEN. Synthese und Eigenschaften
Horner, L.,Simons, G.
, p. 189 - 210 (2007/10/02)
Alkylphenylethers, ortho-lithiated in good yields, are transformed according to scheme (1) to the triarylphosphines ArPPh2, Ar2PPh and Ar3P (Ar contains in all cases an ortho-alkoxy group) (Table 1.).Hydroquinonedialkylethers can be lithiated twice, forming the compounds 102 and 103.Table 2 summarizes some arylalkylethers (71 - 101) which were lithiated; table 7 presents 12 new arylalkylethers.The syntheses of triarylphosphines with one or two bulky groups (105 - 110) and of triarylphosphines with one or two 3,4-dialkoxyphenyl groups (111 - 114) are reported.The 31P-spectra of the compounds prepared are discussed with respect to the validity of the Tolman-rule.
